Review on 🔋 DROK Voltage Amp Meter DC: Monitor Solar System Power with 0-300V 200A Capacity - Hall Sensor Voltmeter Ammeter Current Detector Panel by Ronnie Segobiano

So far this seems like a great counter. *except* calibration over time. From time to time it needs to be reset (when there is flow through the 0A sensor). A few tips: 1) To calibrate the current to zero (no load), press and hold the bottom button for a few seconds. 2) To extend the wiring, you need 4 wires instead of 5 - the middle wire in the sensor harness is grounded. 3) Make sure to install the hall sensor with the arrow pointing towards the end of the load. Doesn't "remember" any settings unless you confirm them by pressing and holding the top button. Edit: switch to 2 stars as it requires frequent recalibration (several times a day if you need accuracy) - which is tedious as I have to drain the battery completely to calibrate the ammeter. If they fix this issue, this counter will get 5 stars from me.